Posted by Ashley on Tuesday, January 29, 2013 at 8:20am.
The power P delivered to a load by a current of i amperes through a resistance of 19 ohms, when 110 volts are supplied at one end of the line, is given by the formula P = 110i  19i2 . Determine the maximum power that can be delivered.
maximum power in watts =
My Answer:
My answer is:
P=110i19i^2
P'=11038i
0=11038i
i=2.8947
P"=38 therefore a max
Max Power in watts = 2.8947
can you please confirm this is correct. Thanks

Math Max min problems  Steve, Tuesday, January 29, 2013 at 10:32am
no, maximum power is P(2.8947) = 159.211

Math Max min problems  Ashley, Tuesday, January 29, 2013 at 10:47am
ok. I understand that you took the value and plugged in for i. But can I ask why...

Math Max min problems  Steve, Tuesday, January 29, 2013 at 11:00am
because they asked for maximum power, not the current which produces maximum power. Just because you arrive at an answer, that does not mean you have answered the question.

Math Max min problems  Ashley, Tuesday, January 29, 2013 at 11:46am
Ok.... great. thank you Steve. I know understand!
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